In vitro PGPR properties and osmotic tolerance of different Azospirillum native strains and their effects on growth of maize under drought stress

Authors
Garcia, Julia Elena; Maroniche, Guillermo Andrés; Creus, Cecilia; Suárez-Rodríguez, Ramón; Ramirez-Trujillo, José Augusto; Groppa, María D.
Publication Year
2017
Language
English
Format
article
Status
Versión aceptada para publicación
Description
Osmotic variations in the soil can affect bacterial growth diminishing the number of inoculated bacteria. In a scenario of water deficit having tolerant bacteria would be beneficial to achieve a better response of the plant to stress. Thus, selection of more resistant bacteria could be useful to design new inoculants to be used in arid zones. In this sense, a group of Azospirillum isolates deposited in INTA collection was characterized in order to select strains tolerant to osmotic stress. The results obtained demonstrated that Az19 strain has similar in vitro PGPR characteristics to Az39, the most used strain in Argentina for inoculants industries, with the advantage of a better tolerance to osmotic and salt stress. Inoculation of maize plants with this strain resulted in a better response against water deficit compared to Az39 strain, encouraging us to further study the behavior of this strain in greenhouse and field trials in view of developing new inoculants suitable for areas with water deficit.
Inst. de Microbiología y Zoología Agrícola IMyZA
Fil: Garcia, Julia Elena. INTA. Instituto de Microbiología y Zoología Agrícola; Argentina
Fil: Maroniche, Guillermo Andrés. Unidad Integrada Balcarce-Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias-INTA. Estación Experimental Agropecuaria Balcarce; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Creus, Cecilia. Unidad Integrada Balcarce-Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias-INTA. Estación Experimental Agropecuaria Balcarce; Argentina
Fil: Suárez-Rodríguez, Ramón. Universidad Autónoma del Estado de Morelos. Centro de Investigación en Biotecnología; México
Fil: Ramirez-Trujillo, José Augusto. Universidad Autónoma del Estado de Morelos. Centro de Investigación en Biotecnología; México
Fil: Groppa, María D. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Consejo Nacional de lnvestigaciones Cientificas y Tecnicas. Instituto de Química y Fisicoquímica Biológicas; Argentina
Source
Microbiological research 202 : 21-29. (September 2017)
Subject
Azospirillum
Maíz
Estrés de Sequía
Rizobacterias
Maize
Drought Stress
Rhizobacteria
Access level
Open access
License
Repository
INTA Digital (INTA)
Institution
Instituto Nacional de Tecnología Agropecuaria
OAI Identifier
oai:localhost:20.500.12123/1516